NJ8820 Datasheet | Zarlink Inc

Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink./obsolete_products/ THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT REMENDED FOR NEW DESIGNS DS3277-1.2 FREQUENCY SYNTHESISER (PROM INTERFACE) The NJ8820 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold parators, 10-bit programmable ‘M’ counter, 7-bit programmable ‘A’ counter and the necessary control and latch circuitry for accepting and latching the input data. Data is presented as eight 4-bit words read from an external memory, with the necessary timing signals generated internally. It is intended to be used in conjunction with a two-modulus prescaler such as the SP8710 series to produce a universal binary coded synthesiser. The NJ8820 is available in Plastic DIL (DP) and Miniature Plastic DIL (MP) packages, both with operating temperature range of 230°C to 170°C. The NJ8820MA is available only in Ceramic DIL package with operating temperature range of 240°C to 185°C. PDA PDB LD FIN VSS VDD OSC IN OSC OUT D0 D1 1 2 3 4 5 20 19 18 17 16 CH RB MC DS2 DS1 DS0 PE ME D3 D2 6 7 8 9 10 15 14 13 12 11 DP20, MP20, DG20 Features s s s s Low Power Consumption Direct Interface to ROM or PROM High Performance Sample and Hold Phase Detector >10MHz Input Frequency Fig.1 Pin connections - top...